DAG messages. More...

#include <MDagMessage.h>

Inheritance diagram for MDagMessage:

Public Types
enum	DagMessage { kInvalidMsg = -1, kParentAdded, kParentRemoved, kChildAdded, kChildRemoved, kChildReordered, kInstanceAdded, kInstanceRemoved, kLast }
	The type of DAG changed messages that have occurred. More...

enum	MatrixModifiedFlags { kScaleX = 1<<0, kScaleY = 1<<1, kScaleZ = 1<<2, kShearXY = 1<<3, kShearXZ = 1<<4, kShearYZ = 1<<5, kRotateX = 1<<6, kRotateY = 1<<7, kRotateZ = 1<<8, kTranslateX = 1<<9, kTranslateY = 1<<10, kTranslateZ = 1<<11, kScalePivotX = 1<<12, kScalePivotY = 1<<13, kScalePivotZ = 1<<14, kRotatePivotX = 1<<15, kRotatePivotY = 1<<16, kRotatePivotZ = 1<<17, kScaleTransX = 1<<18, kScaleTransY = 1<<19, kScaleTransZ = 1<<20, kRotateTransX = 1<<21, kRotateTransY = 1<<22, kRotateTransZ = 1<<23, kRotateOrientX = 1<<24, kRotateOrientY = 1<<25, kRotateOrientZ = 1<<26, kRotateOrder = 1<<27, kAll = (1<<28)-1, kScale = kScaleX \| kScaleY \| kScaleZ, kShear = kShearXY \| kShearXZ \| kShearYZ, kRotation = kRotateX \| kRotateY \| kRotateZ, kTranslation = kTranslateX \| kTranslateY \| kTranslateZ, kScalePivot = kScalePivotX \| kScalePivotY \| kScalePivotZ, kRotatePivot = kRotatePivotX \| kRotatePivotY \| kRotatePivotZ, kScalePivotTrans =kScaleTransX \| kScaleTransY \| kScaleTransZ, kRotatePivotTrans =kRotateTransX \| kRotateTransY \| kRotateTransZ, kRotateOrient = kRotateOrientX \| kRotateOrientY \| kRotateOrientZ }
	Indicates which parts of a matrix have been modified. More...

typedef void(*	MMessageParentChildFunction) (MDagMessage::DagMessage msgType, MDagPath &child, MDagPath &parent, void *clientData)
	Pointer to a callback function which takes an MDagMessage, two MDagPaths and a clientData pointer. More...

typedef void(*	MWorldMatrixModifiedFunction) (MObject &transformNode, MDagMessage::MatrixModifiedFlags &modified, void *clientData)
	Pointer to world matrix modified callback function. More...

Public Types inherited from MMessage
enum	Action { kDefaultAction, kDoNotDoAction, kDoAction }
	Callback result action codes. More...

typedef void(*	MBasicFunction) (void *clientData)
	Pointer to a basic callback function. More...

typedef void(*	MElapsedTimeFunction) (float elapsedTime, float lastTime, void *clientData)
	Pointer to an elapsed time callback function. More...

typedef void(*	MCheckFunction) (bool retCode, void clientData)
	Pointer to callback function which returns a true/false result. More...

typedef void(*	MCheckFileFunction) (bool retCode, MFileObject &file, void clientData)
	Pointer to a callback function which takes a file object and returns a result. More...

typedef void(*	MCheckPlugFunction) (bool retCode, MPlug &plug, void clientData)
	Pointer to a callback function which takes a plug and returns a result. More...

typedef void(*	MComponentFunction) (MUintArray componentIds[], unsigned int count, void *clientData)
	Pointer to a callback function which takes an array of component ids. More...

typedef void(*	MNodeFunction) (MObject &node, void *clientData)
	Pointer to a callback function which takes a dependency node. More...

typedef void(*	MStringFunction) (const MString &str, void *clientData)
	Pointer to callback function which takes a string. More...

typedef void(*	MTwoStringFunction) (const MString &str1, const MString &str2, void *clientData)
	Pointer to a callback function which takes two strings. More...

typedef void(*	MThreeStringFunction) (const MString &str1, const MString &str2, const MString &str3, void *clientData)
	Pointer to a callback function which takes three strings. More...

typedef void(*	MStringIntBoolIntFunction) (const MString &str, unsigned int index, bool flag, unsigned int type, void *clientData)
	Pointer to callback function which takes a string, an index, a flag and a type. More...

typedef void(*	MStringIndexFunction) (const MString &, unsigned int index, void *clientData)
	Pointer to callback function which takes a string and index. More...

typedef void(*	MNodeStringBoolFunction) (MObject &node, const MString &, bool, void *clientData)
	Pointer to a callback function which takes a node, a string and a boolean. More...

typedef void(*	MStateFunction) (bool state, void *clientData)
	Pointer to a callback function which takes a boolean state. More...

typedef void(*	MTimeFunction) (MTime &time, void *clientData)
	Pointer to callback function which takes a time. More...

typedef void(*	MPlugFunction) (MPlug &srcPlug, MPlug &destPlug, bool made, void *clientData)
	Pointer to plug connection callback function. More...

typedef void(*	MNodePlugFunction) (MObject &node, MPlug &plug, void *clientData)
	Pointer to a callback function which takes a dependency node and a plug. More...

typedef void(*	MNodeStringFunction) (MObject &node, const MString &str, void *clientData)
	Pointer to a callback function which takes a dependency node and a string. More...

typedef void(*	MParentChildFunction) (MDagPath &child, MDagPath &parent, void *clientData)
	Pointer to to a callback function which takes two DAG nodes in a parent/child relationship. More...

typedef void(*	MModifierFunction) (MDGModifier &modifier, void *clientData)
	Pointer to a callback function which takes a DG modifier. More...

typedef void(*	MStringArrayFunction) (const MStringArray &strs, void *clientData)
	Pointer to a callback function which takes a string array. More...

typedef void(*	MNodeModifierFunction) (MObject &node, MDGModifier &modifier, void *clientData)
	Pointer to a callback function which takes a dependency node and a DG modifier. More...

typedef void(*	MObjArray) (MObjectArray &objects, void *clientData)
	Pointer to a callback function which takes an array of objects. More...

typedef void(*	MNodeObjArray) (MObject &node, MObjectArray &objects, void *clientData)
	Pointer to a callback function which takes a dependency node and an array of objects. More...

typedef void(*	MStringNode) (const MString &str, MObject &node, void *clientData)
	Pointer to a callback function which takes a string and a dependency node. More...

typedef void(*	MCameraLayerFunction) (MObject &cameraSetNode, unsigned int multiIndex, bool added, void *clientData)
	Pointer to a callback function which takes a dependency node, an unsigned integer, and a boolean value. More...

typedef void(*	MCameraLayerCameraFunction) (MObject &cameraSetNode, unsigned int multiIndex, MObject &oldCamera, MObject &newCamera, void *clientData)
	Pointer to a callback function which takes a dependency node, an unsigned integer, and two camera transform nodes. More...

typedef void(*	MConnFailFunction) (MPlug &srcPlug, MPlug &destPlug, const MString &srcPlugName, const MString &dstPlugName, void *clientData)
	Pointer to connection-failed callback function. More...

typedef void(*	MPlugsDGModFunction) (MPlugArray &plugs, MDGModifier &modifier, void *clientData)
	Pointer to a callback function which takes an array of MPlugs and an MDGModifier. More...

typedef void(*	MNodeUuidFunction) (MObject &node, const MUuid &uuid, void *clientData)
	Pointer to a callback function which takes a dependency node and a UUID. More...

typedef Action(*	MCheckNodeUuidFunction) (bool doAction, MObject &node, MUuid &uuid, void *clientData)
	Pointer to a callback function which takes a dependency node and a UUID, and returns a result. More...

typedef void(*	MObjectFileFunction) (const MObject &object, const MFileObject &file, void *clientData)
	Pointer to a callback function which takes an object and a file object. More...

typedef void(*	MCheckObjectFileFunction) (bool retCode, const MObject &referenceNode, MFileObject &file, void clientData)
	Pointer to a callback function which takes an object and a file object and returns a result. More...

typedef void(*	MRenderTileFunction) (int originX, int originY, int tileMaxX, int tileMaxY, const void *tileData)
	Pointer to a callback function which receives origin, size and image data. More...

typedef void(*	MBasicListOfPairsFunction) (MObjectArray &objects, MObjectArray &duplicates, void *clientData)
	Pointer to a basic callback function with a list of pairs. More...

typedef void(*	MStringBoolFunction) (const MString &str, bool state, void *clientData)
	Introduced in 2026.0 More...

Static Public Member Functions
static MCallbackId	addParentAddedCallback (MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a parent is added in the DAG. More...

static MCallbackId	addParentAddedDagPathCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a parent is added to the specified DAG node. More...

static MCallbackId	addParentRemovedCallback (MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a parent is removed in the DAG. More...

static MCallbackId	addParentRemovedDagPathCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a parent is removed from the specified DAG node. More...

static MCallbackId	addChildAddedCallback (MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a child is added in the DAG. More...

static MCallbackId	addChildAddedDagPathCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a child is added to the specified DAG node. More...

static MCallbackId	addChildRemovedCallback (MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a child is removed in the DAG. More...

static MCallbackId	addChildRemovedDagPathCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a child is removed from the specified DAG node. More...

static MCallbackId	addChildReorderedCallback (MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a child is reordered in the DAG. More...

static MCallbackId	addChildReorderedDagPathCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a child of the specified DAG node is reordered. More...

static MCallbackId	addDagCallback (DagMessage msgType, MDagMessage::MMessageParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called for specified DAG changes on all nodes. More...

static MCallbackId	addDagDagPathCallback (MDagPath &node, DagMessage msgType, MDagMessage::MMessageParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called for specified a DAG change is made to the specified DAG path. More...

static MCallbackId	addAllDagChangesCallback (MDagMessage::MMessageParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever any DAG change is made to any DAG node. More...

static MCallbackId	addAllDagChangesDagPathCallback (MDagPath &node, MDagMessage::MMessageParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever a DAG change is made to the specified DAG path. More...

static MCallbackId	addInstanceAddedCallback (MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever any node in the DAG is instanced. More...

static MCallbackId	addInstanceAddedDagPathCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever the specified node is instanced. More...

static MCallbackId	addInstanceRemovedCallback (MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever an instance of any DAG node is removed or deleted. More...

static MCallbackId	addInstanceRemovedDagPathCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called whenever an instance of the specified node is removed. More...

static MCallbackId	addMatrixModifiedCallback (MDagPath &node, MDagMessage::MWorldMatrixModifiedFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called when the local matrix on the specified DAG node changes. More...

static MCallbackId	addWorldMatrixModifiedCallback (MDagPath &node, MDagMessage::MWorldMatrixModifiedFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	This method registers a callback that is called when a parent matrix of the specified DAG node changes. More...

static const char *	className ()
	Returns the name of this class. More...

static MCallbackId	addParentAddedCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

static MCallbackId	addParentRemovedCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

static MCallbackId	addChildAddedCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

static MCallbackId	addChildRemovedCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

static MCallbackId	addChildReorderedCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

static MCallbackId	addInstanceAddedCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

static MCallbackId	addInstanceRemovedCallback (MDagPath &node, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

static MCallbackId	addDagCallback (DagMessage msgType, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2015.0 More...

static MCallbackId	addDagCallback (MDagPath &node, DagMessage msgType, MMessage::MParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2015.0 More...

static MCallbackId	addDagCallback (MDagPath &node, DagMessage msgType, MDagMessage::MMessageParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

static MCallbackId	addAllDagChangesCallback (MDagPath &node, MDagMessage::MMessageParentChildFunction func, void clientData=NULL, MStatus ReturnStatus=NULL)
	Deprecated in 2019.0 More...

Static Public Member Functions inherited from MMessage
static MStatus	removeCallback (MCallbackId id)
	Remove the specified callback from maya. More...

static MStatus	removeCallbacks (MCallbackIdArray &ids)
	Remove all of the specified callbacks from maya. More...

static MCallbackId	currentCallbackId (MStatus *ReturnStatus=NULL)
	Return the callback ID of the currently executing callback. More...

static MStatus	nodeCallbacks (MObject &node, MCallbackIdArray &ids)
	Returns a list of callback IDs associated registered to a given node. More...

static void	setRegisteringCallableScript ()
	Mark this MMessage object as one that will be passed callbacks defined in script.

static bool	registeringCallableScript ()
	Return true if this MMessage object has its callbacks defined in script.

static void	stopRegisteringCallableScript ()
	Introduced in 2019.0 More...

static void	setCallableInfo (MPluginCallableInfo *info)
	Introduced in 2020.0 More...

static MPluginCallableInfo *	getCallableInfo ()
	Introduced in 2020.0 More...

static MPluginCallableInfo *	stealCallableInfo ()
	Introduced in 2020.0 More...

static const char *	className ()
	Returns the name of this class. More...

static MStatus	removeCallbacks (MIntArray &ids)
	Deprecated in 2019.0 More...

static MStatus	nodeCallbacks (MObject &node, MIntArray &ids)
	Deprecated in 2019.0 More...

Detailed Description

DAG messages.

This class is used to register callbacks for DAG messages.

There are 6 types of add callback methods which will add callbacks for the following messages

Parent Added
Parent Removed
Child Added
Child Removed
Child Reordered
Instance Added
Instance Removed

Methods exist to register callbacks for every time any DAG node is affected as well as methods that work on specific nodes. Each method returns an id which is used to remove the callback.

To remove a callback use MMessage::removeCallback. All callbacks that are registered by a plug-in must be removed by that plug-in when it is unloaded. Failure to do so will result in a fatal error.

NOTE: It is possible to get Parent Added and Child Added messages before the node name has been set. This can happen if the node is newly created. Additionally, the MDagPath string path names passed to the callback may not be set as yet if the node has not been added to the model. Accessing objects that are newly created or calling commands that access such objects from a callback may produce unknown results.

Member Typedef Documentation

typedef void(* MMessageParentChildFunction) (MDagMessage::DagMessage msgType, MDagPath &child, MDagPath &parent, void *clientData)

Pointer to a callback function which takes an MDagMessage, two MDagPaths and a clientData pointer.

Parameters

[in]	msgType	Type of message which caused the function to be called.
[in,out]	child	First DAG path, usually used to pass the child of a parent/child pair.
[in,out]	parent	Second DAG path, usually use to pass the parent of a parent/child pair.
[in,out]	clientData	User-defined data which was supplied when the callback was added.

typedef void(* MWorldMatrixModifiedFunction) (MObject &transformNode, MDagMessage::MatrixModifiedFlags &modified, void *clientData)

Pointer to world matrix modified callback function.

Parameters

[in]	transformNode	The node whose transformation has changed.
[in]	modified	The flag which shows what has changed.
[in]	clientData	Pointer to user-defined data supplied when the callback was registered.

Member Enumeration Documentation

enum DagMessage

The type of DAG changed messages that have occurred.

Enumerator
kInvalidMsg	an invalid message was used.
kParentAdded	a parent was added to a DAG node
kParentRemoved	a parent was removed from a DAG node
kChildAdded	a child was added to a DAG node
kChildRemoved	a child was removed from a DAG node
kChildReordered	a child of a DAG node was reordered
kInstanceAdded	a DAG node was instanced
kInstanceRemoved	a DAG node instance was removed
kLast	a dummy value (used for looping through the message types)

enum MatrixModifiedFlags

Indicates which parts of a matrix have been modified.

Enumerator
kScaleX	Scale in the X axis.
kScaleY	Scale in the Y axis.
kScaleZ	Scale in the Z axis.
kShearXY	Shear in the XY plane.
kShearXZ	Shear in the XZ plane.
kShearYZ	Shear in the YZ plane.
kRotateX	Rotate around the X axis.
kRotateY	Rotate around the Y axis.
kRotateZ	Rotate around the Z axis.
kTranslateX	Translate along the X axis.
kTranslateY	Translate along the Y axis.
kTranslateZ	Translate along the Z axis.
kScalePivotX	Scale pivot X position.
kScalePivotY	Scale pivot Y position.
kScalePivotZ	Scale pivot Z position.
kRotatePivotX	Rotate pivot X position.
kRotatePivotY	Rotate pivot Y position.
kRotatePivotZ	Rotate pivot Z position.
kScaleTransX	Scale pivot translation along X axis.
kScaleTransY	Scale pivot translation along Y axis.
kScaleTransZ	Scale pivot translation along Z axis.
kRotateTransX	Rotate pivot translation along X axis.
kRotateTransY	Rotate pivot translation along Y axis.
kRotateTransZ	Rotate pivot translation along Z axis.
kRotateOrientX	Rotation orientation around the X axis.
kRotateOrientY	Rotation orientation around the Y axis.
kRotateOrientZ	Rotation orientation around the Z axis.
kRotateOrder	Rotation order.
kAll	All.
kScale	Scale in all axis.
kShear	Shear in all axis.
kRotation	Rotation around all axis.
kTranslation	Translation along all axis.
kScalePivot	Scale pivot in all axis.
kRotatePivot	Rotate pivot in all axis.
kScalePivotTrans	Scale pivot translation for all axis.
kRotatePivotTrans	Rotate pivot translation for all axis.
kRotateOrient	Rotation orientation around all axis.

Member Function Documentation

OPENMAYA_MAJOR_NAMESPACE_OPEN MCallbackId addParentAddedCallback	(	MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a parent is added in the DAG.

Please see the note in the Description section about this callback.

Parameters

[in] func the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addParentAddedDagPathCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a parent is added to the specified DAG node.

Please see the note in the Description section about this callback.

Parameters

[in]	node	The DAG node to register the callback for
[in]	func	the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

Examples:: gpuCache/gpuCacheSubSceneOverride.cpp.

MCallbackId addParentRemovedCallback	(	MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a parent is removed in the DAG.

Parameters

[in] func the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addParentRemovedDagPathCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a parent is removed from the specified DAG node.

Parameters

[in]	node	The DAG node to register the callback for
[in]	func	the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

Examples:: gpuCache/gpuCacheSubSceneOverride.cpp.

MCallbackId addChildAddedCallback	(	MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a child is added in the DAG.

Please see the note in the Description section about this callback.

Parameters

[in] func the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addChildAddedDagPathCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a child is added to the specified DAG node.

Please see the note in the Description section about this callback.

Parameters

[in]	node	The DAG node to register the callback for
[in]	func	the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addChildRemovedCallback	(	MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a child is removed in the DAG.

Parameters

[in] func the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addChildRemovedDagPathCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a child is removed from the specified DAG node.

Parameters

[in]	node	The DAG node to register the callback for
[in]	func	the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addChildReorderedCallback	(	MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a child is reordered in the DAG.

Parameters

[in] func the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addChildReorderedDagPathCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a child of the specified DAG node is reordered.

Parameters

[in]	node	The DAG node to register the callback for
[in]	func	the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addDagCallback	(	DagMessage	msgType,
		MDagMessage::MMessageParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called for specified DAG changes on all nodes.

The callback will also receive the DagMessage.

Please see the note in the Description section about this callback if Parent Added or Child Added messages are being used.

Parameters

[in]	msgType	The type of DAG change to trigger the callback
[in]	func	the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

Examples:: dagMessageCmd/dagMessageCmd.cpp.

MCallbackId addDagDagPathCallback	(	MDagPath &	node,
		DagMessage	msgType,
		MDagMessage::MMessageParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called for specified a DAG change is made to the specified DAG path.

The callback receives the DagMessage as well.

Please see the note in the Description section about this callback if Parent Added or Child Added messages are being used.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	msgType	The type of DAG change to trigger the callback.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

Examples:: dagMessageCmd/dagMessageCmd.cpp, and instanceCallbackCmd/instanceCallbackCmd.cpp.

MCallbackId addAllDagChangesCallback	(	MDagMessage::MMessageParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever any DAG change is made to any DAG node.

Please see the note in the Description section about this callback if Parent Added or Child Added messages are being used.

Parameters

[in] func the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

Examples:: dagMessageCmd/dagMessageCmd.cpp, and transformDrawNode/transformDrawNode.cpp.

MCallbackId addAllDagChangesDagPathCallback	(	MDagPath &	node,
		MDagMessage::MMessageParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever a DAG change is made to the specified DAG path.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

Examples:: dagMessageCmd/dagMessageCmd.cpp.

MCallbackId addInstanceAddedCallback	(	MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever any node in the DAG is instanced.

Parameters

[in] func the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addInstanceAddedDagPathCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever the specified node is instanced.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

Examples:: footPrintNode_SubSceneOverride/footPrintNode_SubSceneOverride.cpp, geometryOverrideExample1/geometryOverrideExample1.cpp, geometryOverrideExample2/geometryOverrideExample2.cpp, and gpuCache/gpuCacheSubSceneOverride.cpp.

MCallbackId addInstanceRemovedCallback	(	MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever an instance of any DAG node is removed or deleted.

Parameters

[in] func the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addInstanceRemovedDagPathCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called whenever an instance of the specified node is removed.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

Examples:: footPrintNode_SubSceneOverride/footPrintNode_SubSceneOverride.cpp, and gpuCache/gpuCacheSubSceneOverride.cpp.

MCallbackId addMatrixModifiedCallback	(	MDagPath &	affectedNode,
		MDagMessage::MWorldMatrixModifiedFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called when the local matrix on the specified DAG node changes.

If the node's transformation is already dirty (i.e. it has not been evaluated since it was last changed) then the callback will not be triggered. So if the node's transformation is modified multiple times between evaluations, only the first one will result in the callback being called.

Parameters

[in]	affectedNode	The DAG node to register the callback for.
[in]	func	The callback function. triggerNode The node whose transformation changed flag How the trigger node's transformation changed clientData User defined data passed to the callback function.
[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

MCallbackId addWorldMatrixModifiedCallback	(	MDagPath &	affectedNode,
		MDagMessage::MWorldMatrixModifiedFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

This method registers a callback that is called when a parent matrix of the specified DAG node changes.

Since a node's worldMatrix is affected by the transforms of its ancestors in the DAG, it's possible for there to be two different nodes involved: the "trigger" node, whose transform has changed, and the "affected" node, whose worldMatrix is affected by the change to the trigger.

The callback is placed on the affected node, but it is the trigger node which is passed to the callback.

If the trigger node's transformation is already dirty (i.e. it has not been evaluated since it was last changed) then the callback will not be triggered. So if the trigger node's transformation is modified multiple times between evaluations, only the first one will result in the callback being called.

Parameters

[in]	affectedNode	The DAG node to register the callback for.
[in]	func	The callback function. triggerNode The node whose transformation changed flag How the trigger node's transformation changed clientData User defined data passed to the callback function.
[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

Examples:: gpuCache/gpuCacheSubSceneOverride.cpp, and transformDrawNode/transformDrawNode.cpp.

const char * className ( )

static

Returns the name of this class.

Returns: The name of this class.

MCallbackId addParentAddedCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addParentAddedDagPathCallback instead.

2019.0:: Deprecated in this version.

This method registers a callback that is called whenever a parent is added to the specified DAG node.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addParentRemovedCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addParentRemovedDagPathCallback instead.

2019.0:: Deprecated in this version.

This method registers a callback that is called whenever a parent is removed from the specified DAG node.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addChildAddedCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addChildAddedDagPathCallback instead.

2019.0:: Deprecated in this version.

This method registers a callback that is called whenever a child is added to the specified DAG node.

Please see the note in the Description section about this callback.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

MCallbackId addChildRemovedCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addChildRemovedDagPathCallback instead.

2019.0:: Deprecated in this version.

This method registers a callback that is called whenever a child is removed from the specified DAG node.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

MCallbackId addChildReorderedCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addChildReorderedDagPathCallback instead.

2019.0:: Deprecated in this version.

This method registers a callback that is called whenever a child of the specified DAG node is reordered.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

MCallbackId addInstanceAddedCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addDagCallback instead.

2019.0:: Deprecated in this version.

This method registers a callback that is called whenever the specified node is instanced

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

MCallbackId addInstanceRemovedCallback	(	MDagPath &	node,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addDagCallback instead.

2019.0:: Deprecated in this version.

This method registers a callback that is called whenever an instance of the specified node is removed.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

MCallbackId addDagCallback	(	DagMessage	msgType,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2015.0

Not available in Python.

Deprecated:: Use MDagMessage::addDagCallback instead.

2015.0:: Deprecated in this version.

This method registers a callback that is called whenever a DAG change is made.

Please see the note in the Description section about this callback if Parent Added or Child Added messages are being used.

Parameters

[in]	msgType	The type of DAG change to trigger the callback
[in]	func	the callback function

child The child involved in the change
parent The parent involved in the change
clientData User defined data passed to the callback function

Parameters

[in]	clientData	User defined data passed to the callback function
[out]	ReturnStatus	status code

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded
MS::kInsufficientMemory No memory available
MS::kFailure Error adding callback

MCallbackId addDagCallback	(	MDagPath &	node,
		DagMessage	msgType,
		MMessage::MParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2015.0

Not available in Python.

Deprecated:: Use MDagMessage::addDagDagPathCallback instead.

2015.0:: Deprecated in this version.

This method registers a callback that is called whenever a DAG change is made to a specified node.

Please see the note in the Description section about this callback if Parent Added or Child Added messages are being used.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	msgType	The type of DAG change to trigger the callback.
[in]	func	The callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

MCallbackId addDagCallback	(	MDagPath &	node,
		DagMessage	msgType,
		MDagMessage::MMessageParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addDagDagPathCallback instead.

2019.0:: Deprecated in this version.

MCallbackId addAllDagChangesCallback	(	MDagPath &	node,
		MDagMessage::MMessageParentChildFunction	func,
		void *	clientData = `NULL`,
		MStatus *	ReturnStatus = `NULL`
	)

static

Deprecated in 2019.0

Not available in Python.

Deprecated:: Use MDagMessage::addAllDagChangesDagPathCallback instead.

2019.0:: Deprecated in this version.

This method registers a callback that is called whenever a DAG change is made to the specified DAG path.

Parameters

[in]	node	The DAG node to register the callback for.
[in]	func	the callback function.

child The child involved in the change.
parent The parent involved in the change.
clientData User defined data passed to the callback function.

Parameters

[in]	clientData	User defined data passed to the callback function.
[out]	ReturnStatus	Status code.

Returns: Identifier used for removing the callback.

Status Codes:

MS::kSuccess Operation succeeded.
MS::kInsufficientMemory No memory available.
MS::kFailure Error adding callback.

The documentation for this class was generated from the following files:

MDagMessage.h
MDagMessage.cpp

Public Types

Static Public Member Functions

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Member Function Documentation